1. Sound Waves
What's
Happening?
Wave
Basics
Wave
Behaviors
Sound Changes
Sound
Math
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Theme
End Round
Final Jeopardy

2. Give the name for this type of wave:
Wave Basics Points
Give the name for this type of wave:  

3. Longitudinal (or Compression)
Wave Basics Points
Longitudinal (or Compression)
Wave

4. Give the name for this type of wave:
Wave Basics Points
Give the name for this type of wave:  

5. Wave Basics Points
Transverse Wave

6. What is the definition of a wave's frequency?
Wave Basics Points
What is the definition of a wave's frequency?  

7. Frequency = #cycles/sec
Wave Basics Points
Frequency = #cycles/sec
How “often” it occurs

8. Wave Basics Points
Longitudinal waves have _____ and _____, like the crests and troughs of transverse waves.  

9. Compressions and rarefactions
Wave Basics Points
Compressions and rarefactions

10. Wave Basics Points
Draw a repeating longitudinal wave, and then draw a box around one wavelength.  

11. |||| | | |||| | | |||| | | ||||
Wave Basics Points
|||| | | |||| | | |||| | | ||||

12. Wave Behaviors Points
A wave hits a wall and bounces back towards its source. What is this called?  

13. Wave Behaviors Points
Reflection

14. Wave Behaviors Points
A wave encounters a small opening in a wall and pushes through it, spreading its energy all around as it does so. What is this called?  

15. Wave Behaviors Points
Diffraction

16. Wave Behaviors 300 Points 
You perceive a wave source to have higher frequency as it comes towards you; you perceive a wave source to have lower frequency as it moves farther away. What is this called?  

17. Wave Behaviors Points
Doppler Effect

18. Wave Behaviors Points
The A-string on a guitar starts to vibrate when you play the same note on a flute form across the room. What behavior of sound waves causes this?  

19. Wave Behaviors 400 Points
Resonance

20. Two objects resonate when they vibrate at their
Wave Behaviors Points
Two objects resonate when they vibrate at their
_______ _______ .  

21. Wave Behaviors Points
Natural Frequencies

22. Sound Changes Points
Different sound pitches are achieved with different wave _____________.  

23. Sound Changes Points
Frequencies

24. Sound Changes Points
For every +10 decibel of difference, the loudness (or sound intensity) gets ____ louder.  

25. Sound Changes Points
x10

26. Sound Changes Points
The temperature yesterday was 70 degrees Fahrenheit. The temperature today is 60 degrees Fahrenheit. How did the speed of sound change from yesterday to today?  

27. Sound traveled faster yesterday than it did today.
Sound Changes Points
Sound traveled faster yesterday than it did today.

28. Sound Changes 400 Points
When you turn up the volume on your stereo, what property of the sound waves are you changing?  

29. Sound Changes Points
Amplitude

30. Sound Changes Points
You're hiking up Mount Everest, and it's getting harder to breathe. Air is thinner up there than it is in your physics classroom! What happens to the speed of sound as you ascend the mountain?  

31. As air gets thinner (AKA less dense), the speed of sound decreases.
Sound Changes Points
As air gets thinner (AKA less dense), the speed of sound decreases.

32. What's Happening? 100 Points
You say something in an empty room and you hear your own voice echo back. What property of waves accounts for this?  

33. What's Happening? 100 Points
Reflection

34. What's Happening? 200 Points
As someone falls off a cliff, his scream seems to change gradually to a lower pitch. He's not actually changing his pitch. What's going on here?  

35. What's Happening? 200 Points
Doppler Effect

36. What's Happening? 300 Points
Close your eyes and imagine that you hear a constant sound that's getting closer to you. In addition to getting louder, what is happening to the pitch of this sound?  

37. What's Happening? 300 Points
Pitch is getting higher

38. What's Happening? 400 Points
Two rooms located next to each other have their doors open. When a teacher talks in one room, the other room's students can hear her. There is no direct path between the two rooms. What behavior of waves makes this possible?  

39. What's Happening? 400 Points
Diffraction

40. What's Happening? 500 Points
Bats use echolocation to “see” their surroundings. They send out sound pulses and determine what their surroundings look like by the time it takes for those pulses to bounce back. If a bat is flying towards its prey, what TWO wave properties affect how the bat perceives its prey's movement?  

41. Reflection and the Doppler Effect
Similarity Points
Reflection and the Doppler Effect

42. Sound Math Points
A wave cycles through 6 times in 24 seconds. What is the period of this wave?  

43. Sound Math Points
4 seconds

44. Sound Math Points
Sound is traveling at 343 m/s. If the frequency of a note is 686 Hz, what is the wavelength of that note?  

45. Sound Math Points
0.5 meters

46. Sound Math Points
If the cry of a hawk is one thousand times louder than the squeak of a mouse, how many decibels of difference is this?  

47. Sound Math Points
30 dB

48. Sound Math Points
If one sound is 30 dB, and another sound is 50 dB, how much louder than the first sound is the second sound?  

49. Sound Math Points
100 times louder

50. Sound Math Points
A bat uses echolocation to find prey. If a bat sends out a sound pulse that echoes back to it in 2 seconds, how far away is the object it hit?
Speed of sound = 343 m/s  

51. Sound Math Points
343 meters

52. Sound
Final
Jeopardy

53. Does sound travel fastest in air, water, or solid? Why?
FINAL JEOPARDY
Does sound travel fastest in air, water, or solid? Why?  

54. FINAL JEOPARDY
SOLID
Because the particles in a solid are the closest together (AKA the most dense), and therefore particles have an easier time bumping into each other.
Note the opposite scenario, where sound cannot travel in space because space is a vacuum (no particles).